Liberator of Wraeclast Supporter Pack upgrade

Hello, hope you are doing well.

I currently have the Warlord of the Karui Supporter Pack. I opt out
from the physical items. However i was thinking in upgrading to the
Liberator of Wraeclast Supporter and actually get the artbook as
suggested by an user and a mod in this forum post:
https://www.pathofexile.com/forum/view-thread/3590399

However when i try to upgrade it says that i can't get any physical
item in this case the art book. Is there a way to put the option
available at least, are you planning on selling the art book in the
future?

Thanks